Jong Hoa CHONG

Full-Stack Web Developer

Salary / Daily rate

Paris, France

Freelance, open to permanent contract

Can come onsite

Skills

ReactNodeJavascriptIonicDevOpsHTMLBootstrapTypescriptNextGitSassPHPNestFlutterCSSReduxExpressMongoDBMySQLPostmanPythonPostgreSQLSQLiteFullstack DevelopmentClean CodeClean ArchitectureLLMs / Large language modelsFirebaseGitHubScrumSEOAdobe LightroomAdobe PhotoshopFigmaNotion

Languages

Chinese (Native)French (Fluent)English

About me

Intro

Full-stack developer with 3+ years building scalable web and mobile applications. Led AI-powered app development (iOS/Android/Web) serving young professionals, with expertise in React, Node.js, and cloud infrastructure. Deliver production-ready solutions with automated testing and cross-platform deployment.

Links

Work experience

Mavoie.org

Apr 2022 - Present

4 years 7 months

Paris · Hybrid

Web developer

Sep 2022 - Present

4 years 2 months

Paris · Hybrid

🚀 Full-Stack Development for the Livia App: AI Coaching (iOS, Android, Webapp) 🚀 I contributed to the development of Livia, an innovative app combining technology and artificial intelligence to support young people in their professional integration. Key Contributions: ✅ Architecture & Sustainability: Participated in designing the software architecture and strategic technology choices. ✅ Cross-Functional Collaboration: Worked closely with product and design teams to define specifications and plan the roadmap. ✅ Quality & Performance: Implemented automated tests, proactive maintenance, and continuous optimization to ensure a stable, high-performing app. ✅ AI Integration: Contributed to managing infrastructure connected to AI models for intelligent, scalable features. ✅ Multi-Platform Delivery: Successfully deployed on iOS, Android, and Webapp, with detailed technical documentation and production procedures. Key Deliverables: 📱 Production-ready Livia app (stable, cross-platform versions) 📄 Technical documentation and test reports 📊 Analytics for user tracking and continuous improvement 🔗 Other Recent Projects: • MaVoie.org : Interactive tool to help young people define their career paths. • 1Entretien1Job: Interview preparation platform with personalized feedback.

Web Developer Interne

Apr 2022 - Aug 2022

5 months

Paris, France

Skills: Express.js · Français · Jest · Feuilles de style en cascade (CSS) · Redux.js · NoSQL · DevOps · HTML5 · Node.js · HTML · Git · Langage de modélisation unifié (UML) · Kanban · Anglais · Méthodes agiles · JavaScript · Développement Android · Firebase · React.js · Développement iOS · Test Driven Development

Sales Specialist

UNIQLO

Oct 2020 - Mar 2021

6 months

On-site

🏬 Experience at Uniqlo During my experience at Uniqlo, I was committed to providing impeccable customer service, inspired by Japanese standards of excellence and attention to detail. I developed a strong knowledge of the products to highlight the most relevant selling points and effectively guide each customer in their choices. 🌟 Skills Developed • Versatility & Adaptability : I was often called upon to cover for absent colleagues and reorganize product displays in the store to optimize the shopping experience. • Delivery Management : From receiving goods to carefully checking packages, I ensured the availability and quality of the products offered. 🚀 What This Experience Brought Me • Enhanced sense of service • Strong professional rigor • Ability to work as part of a team in a dynamic and demanding environment This experience at Uniqlo allowed me to embrace the Japanese culture of service and bring real added value to both the team and the customers.

Sales Specialist

POP-UP Store Wizarding World at Galeries Lafayette

Nov 2018 - Jan 2019

3 months

Paris · On-site

🏬 Experience at a Lafayette Pop-Up Store Within a Lafayette pop-up store, I quickly adapted to various sales tools and software, optimizing both transaction management and the overall customer experience. 🌍 Working in an International Environment • Used my skills in English and Chinese daily to welcome, advise, and build loyalty with a diverse clientele. • Adapted to a wide range of customer profiles, ensuring personalized service. 🗣️ Communication & Engagement • Demonstrated excellent communication skills, especially in capturing children’s attention and creating a friendly, dynamic atmosphere. • Organized activities and interactions to make the in-store experience memorable. 🤝 Team Spirit & Positive Atmosphere • Actively contributed to team cohesion and spirit. • Helped foster a positive work environment, supporting the achievement of common goals. This experience allowed me to develop my adaptability, cultural openness, and ease in navigating demanding multicultural settings.

Sales Specialist

Swatch

Nov 2016 - Oct 2018

2 years

Paris, France

🛒 Experience in Sales and Team Management During my experience, I developed a strong command of the company’s sales techniques, such as icebreakers, to capture customers’ attention and optimize their in-store experience. 👥 Management & Training • Managed and trained new team members • Ensured their smooth integration and shared best practices to guarantee quality service 📋 Precision & Operational Management • Strictly applied procedures for exchanges and refunds • Closely monitored customer feedback to improve satisfaction 📦 Stock Management & Anticipation • Proactively managed inventory: anticipated orders based on bestsellers, forecasts, and store needs • Ensured optimal product availability to support commercial performance This experience allowed me to strengthen my skills in management, operational management, and customer relations, while developing my sense of organization and anticipation.

Web Developer

AFK SystemFreelance

Jan 2011 - Jan 2013

2 years 1 month

Paris · On-site

Of course! Here’s your text translated into English with light Markdown formatting: As part of my work, I conduct research and analysis of client needs in order to offer tailor-made web solutions. I design the project specifications, advise, and support clients throughout the entire project. • Website creation • Development of custom WordPress themes and plugins • Web integration and development of PHP/MySQL modules tailored to specific needs I also handle content writing for the website and ensure its SEO optimization. Thanks to my versatility, I provide comprehensive support-from project definition to launch-while ensuring ongoing follow-up and client satisfaction.


Education

EFREI - Grande école du numérique

Master 2 (M2)

2024 - 2025

1 year 2 months

EFREI - Grande école du numérique

Master 1 (M1)

2023 - 2024

1 year 2 months

EFREI - Grande école du numérique

Bachelor's degree

2022 - 2023

1 year 2 months

Konexio.eu

Développeur web et web mobile (RNCP niveau 5

2021 - 2022

1 year 2 months

Simplon.co

Apple Foundation Program

2021 - 2021

3 months

Ecole 42

Piscine Mars 2021

2021 - 2021

1 month

Institut national des langues et civilisations orientales (Inalco)

Licence 3

2009 - 2010

1 year 1 month

Lycée Turgot

Brevet de technicien supérieur (BTS)

2007 - 2009

2 years 1 month


Licenses & certifications

Master Dev Manager Full Stack

Issued: Sep 2025

Certified by Efrei

Bachelor Dev & Data

Issued: Sep 2023

Certified by Efrei

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